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Last updated: 9/30/2014 1:55:18 PM

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National Cyber Awareness System

Vulnerability Summary for CVE-2013-4368

Original release date: 10/17/2013
Last revised: 04/19/2014
Source: US-CERT/NIST

Overview

The outs instruction emulation in Xen 3.1.x, 4.2.x, 4.3.x, and earlier, when using FS: or GS: segment override, uses an uninitialized variable as a segment base, which allows local 64-bit PV guests to obtain sensitive information (hypervisor stack content) via unspecified vectors related to stale data in a segment register.

Impact

CVSS Severity (version 2.0):
CVSS v2 Base Score: 1.9 (LOW) (AV:L/AC:M/Au:N/C:P/I:N/A:N) (legend)
Impact Subscore: 2.9
Exploitability Subscore: 3.4
CVSS Version 2 Metrics:
Access Vector: Locally exploitable
Access Complexity: Medium
Authentication: Not required to exploit
Impact Type: Allows unauthorized disclosure of information

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External Source: SUSE
Name: SUSE-SU-2014:0470
External Source: MLIST
Name: [oss-security] 20131010 Xen Security Advisory 67 (CVE-2013-4368) - Information leak through outs instruction emulation
External Source: SUSE
Name: SUSE-SU-2014:0446
External Source: REDHAT
Name: RHSA-2013:1449
External Source: XF
Name: xen-cve20134368-info-disc(87799)
External Source: SUSE
Name: SUSE-SU-2014:0411
External Source: SUSE
Name: openSUSE-SU-2013:1636

Technical Details

Vulnerability Type (View All)
  • Information Leak / Disclosure (CWE-200)